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The dam monitoring system sets different levels of alarms corresponding to specific risks, like a reduction of lake water levels, and communicates risks with a network of all dam control systems. When the level of risk increases, the monitoring system activates alarms to close roads or bridges, and eventually alerts people living in nearby ...
Land subsidence is a global issue and has different causes. Some are natural, like earthquakes , and some are caused by humans. In the United States, land subsidence from over pumping has affected 45 states and accounts for changes in over 17,000 square miles of land which is an area almost 10 times the size of Glacier National Park in Montana ...
These sensors work by sending in small electromagnetic waves into the subsurface level, and receiving information as these waves are returned. [12] Key components of studying land subsidence in the Central Valley include large and small scale monitoring, studying topography in relation to groundwater, and a multi-agency approach.
This module uses ERA5 data for correction. [17] (click on the link) RAiDER: This python package implements the raytracing method to measure and reduce tropospheric noise. . [31] (click on the link) GACOS: This package in MATLAB generates high-resolution atmospheric data and then separates stratified and turbulent signals to remove tropospheric ...
Aquifer compaction is a significant concern along with pumping-induced land subsidence. A large portion of the groundwater storage potential of many aquifers can be significantly reduced when longterm groundwater extraction, and the resulting groundwater level decline, causes permanent compaction of fine sediment layers (silts and clays).
South Pacific Sea Level and Climate Monitoring Project (SPSLCMP) is a project initiated by government of Australia. The primary goal of the project is to provide accurate, long term records of the variance of the sea level in the Pacific and South Pacific oceans.
Nearly half of China’s urban areas comprising 29% of the country’s population are sinking faster than 3 millimeters per year, according to a new study.
Subsidence frequently causes major problems in karst terrains, where dissolution of limestone by fluid flow in the subsurface creates voids (i.e., caves).If the roof of a void becomes too weak, it can collapse and the overlying rock and earth will fall into the space, causing subsidence at the surface.